docs: def add_pipeline(subparsers):
      """Pipeline subcommands."""
      pipeline_parser = subparsers.add_parser(
          'pipeline', help=add_pipeline.__doc__, formatter_class=argparse.ArgumentDefaultsHelpFormatter)
      pipeline_parser.set_defaults(func=pipeline_parser.print_help)
  
      pipeline_subparsers = pipeline_parser.add_subparsers(title='Pipelines')
  
      pipeline_full_parser = pipeline_subparsers.add_parser(
          'app', help=runner.prepare_app_pipeline.__doc__, formatter_class=argparse.ArgumentDefaultsHelpFormatter)
      pipeline_full_parser.set_defaults(func=runner.prepare_app_pipeline)
  
      pipeline_onetime_parser = pipeline_subparsers.add_parser(
          'onetime', help=runner.prepare_onetime_pipeline.__doc__, formatter_class=argparse.ArgumentDefaultsHelpFormatter)
      pipeline_onetime_parser.set_defaults(func=runner.prepare_onetime_pipeline)
      add_env(pipeline_onetime_parser)